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index
int index
Column index in record.
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label
String label
The label of column (e.g., "_start", "_stop", "_time").
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dataType
String dataType
The data type of column (e.g., "string", "long", "dateTime:RFC3339").
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group
boolean group
Boolean flag indicating if the column is part of the table's group key.
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defaultValue
String defaultValue
Default value to be used for rows whose string value is the empty string.